Automated IWYU fix for TaskRunner includes.

chrome/browser/extensions/updater/local_extension_cache_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/updater/local_extension_cache.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
 #include "base/run_loop.h"
+#include "base/sequenced_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/test/sequenced_worker_pool_owner.h"
 #include "base/values.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "content/public/test/test_utils.h"
 #include "crypto/secure_hash.h"
 #include "crypto/sha2.h"
@@ skipping 420 matching lines @@
   const base::FilePath hashed2 =
       GetExtensionFileName(cache_dir, kTestExtensionId1, "3.0", hash4);
   EXPECT_TRUE(base::PathExists(hashed2));
   EXPECT_TRUE(cache.GetExtension(kTestExtensionId1, hash4, NULL, NULL));
   // Old file kept
   EXPECT_TRUE(cache.GetExtension(kTestExtensionId1, hash3, NULL, NULL));
   EXPECT_TRUE(base::DeleteFile(temp7, false));
 }
 
 }  // namespace extensions